MFen: updates to the Mongolian translation of the Handbook.

1.106 -> 1.107 mn_MN.UTF-8/books/handbook/Makefile
1.396 -> 1.398 mn_MN.UTF-8/books/handbook/advanced-networking/chapter.sgml
1.361 -> 1.364 mn_MN.UTF-8/books/handbook/install/chapter.sgml
1.126 -> 1.127 mn_MN.UTF-8/books/handbook/multimedia/chapter.sgml
1.98 -> 1.99 mn_MN.UTF-8/books/handbook/network-servers/chapter.sgml